Quick follow up question on employee handbooks

https://donovanlrms532.halcyonledger.com/posts/how-probate-works-in-nebraska-and-how-an-omaha-law-firm-helps-2

Quick follow-up question on employee handbooks. How often should a small business update theirs? Ours was written in 2019 and I suspect a lot has changed since then, especially around remote work